Alienware owned by Dell is now providing the X51 gaming PC in an Ubuntu version. You can get the X51 Ubuntu version for $599, a whooping $100 off the Windows 7 version. So if you are an Ubuntu enthusiast looking for a good gaming rig, then you are in luck. With steam for Linux now available to the public, you now have an extra feature to add on. The X51 was only available as a Windows system, the Ubuntu X51 comes with an Intel Core i3-3220 processor, 6GB of RAM, 1TB hard drive, and Nvidia GeForce GTX 645 graphics, and offers you the options to load on the upgraded components for additional cash. See source link for more information.
SOURCE: Alienware, Dell Community Blog